Update here as well. Gustard has made updated firmware for their A26 DAC and now the DSD Direct mode works as expected. If you already have A26, you can request firmware update from them. New production coming out from their factory will have the new firmware already.
I have confirmed that DSD128 and DSD256 seem to go through at their native rate (4499EX always operates at 5.6/6.1 or 11.2/12.3 rate).
For best performance:
- Use DSD256
- Enable DSD Direct mode
- Set DSD filter to wide mode - their firmware says “Wild”
You can ignore the small ultrasonic SMPS noise peaks in above graph.
